Question: A teacher is looking for the best option in purchasing school supplies for a classroom. Company A is offering a 5% discount for every dollar amount spent; Company B is offering a 15% discount for every dollar amount spent above $20. Determine which company will offer a better price based upon the dollar amount the teacher spends on school supplies.

In this question, the teacher needs to find which company cost less, as company A can offer a 5% discount for the total amount, and company B can offer a 15% discount for the amount above $20.